PLATE 34 



Leptaena rhomboidalis Wilckens 



Pages III, 183 



I, 2 Two views of the characteristic expression of the species in the 

 lower formations 

 S^ Alban beds. Grande Cavee, Griffon Cove river 



3 A ventral valve 



Grande Grtve limestone. Grande Greve 



Stropheondonta hunti nov. 



Page 185 



4 A ventral valve slightly corrugated at the umbo and with fine radial 



striae, x 2 



5 A more broadly corrugated, auriculate valve, x 2 



6 Enlargement of the cardinal areas, x 3 



7 A ventral valve with broad corrugations and fine radii, x 3 



8 A portion of the surface, x 10 



9 Cardinal area of the dorsal valve showing the strong bifurcate cardinal 



process and the elevated denticulations which serve as accessory 

 teeth. X 3 

 10-12 Other shells with somewhat varying exterior. (10x3: 11x2: 

 12x3) 

 Grande Greve limestone ; division 2. Grande Greve 



Athyris hera nov. 



Page 236 



13 A small ventral valve with narrow sinus and strong concentric lines, x 2 



14 The type of the species. A large ventral valve with broad sinus 

 Gaspe sandstone. Gaspe Basin 



Stropheodonta lincklaeni Hall 



Page 184 



15 External cast of dorsal valve 



16 Exterior of dorsal valve, showing a lamellose surface. The divergent 



lines from the beak are casual 



320 



